Colin Farrell had been on a rocky road of abuse, even entering rehab in 2005.

And his body was paying the price for his actions…

Now, the actor says he's "enjoying life" and instead of focusing on his body with intense effort, he's slowly going through the motions.

Colin explains his new outlook:

I don't put the same level of energy into healthy living as I did into unhealthy living. I put an enormous amount of energy into the destruction of my body and if I put the same amount into treating my body in a positive way, that too would end up being a sickness.

But I eat really well, drink loads of green tea, and take a s**tload of vitamins.

This isn't the first time the 39-year-old's figure has caused controversy. As we reported in January, the American Pie stunner was accused of using Photoshop to make her already narrow waist even smaller.

Reid has admitted to getting plastic surgery in the past to make changes to her abdominal area and breasts -- but the actress asserts that she naturally has a lean shape.